I know for a fact it effects aircraft. I sometimes work with an aviation company, and I was just talking with the Chief Pilot who is ex-military helicopter pilot and now flies private jets. I asked him what he thought about the 5G FAA/Mobile Carrier dispute. He told me it's definitely a thing, he has experienced anomalies with his altimeter himself when in close proximity to the towers. They display a very noticeable incorrect altitude. He also said that the airport he flies in and out of have an extension to the delayed 5G rollout because operations are flown out of there. He said recently he had to land a jet in dense fog with near zero visibility. He said if his altimeter had been affected like it does when near the towers, he would've crashed the aircraft. It was a fascinating conversation. He is very concerned about it.